tabBar 是一个对象，它可以配置标签导航文字的默认颜色、选中颜色，标签导航背景色及上边框颜色。。
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app.wxss 文件是对所有页面定义全局样式。
A. 对
B. 错
31. According to the first paragraph, the process of discovery is characterized by its
A. [A] uncertainty and complexity.
B. [B] misconception and deceptiveness.
C. [C] logicality and objectivity.
D. [D] systematicness and regularity.
32. It can be inferred from Paragraph 2 that credibility process requires
A. [A] strict inspection.
B. [B]shared efforts.
C. [C] individual wisdom.
D. [D]persistent innovation.
33.Paragraph 3 shows that a discovery claim becomes credible after it
A. [A] has attracted the attention of the general public.
B. [B]has been examined by the scientific community.
C. [C] has received recognition from editors and reviewers.
D. [D]has been frequently quoted by peer scientists.
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